[Lynda.com] Download fails for courses in German, English ones work fine

[tersenius]

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.12.31. If it's not, read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2017.12.31

Before submitting an issue make sure you have:

• At least skimmed through the README, most notably the FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

$ youtube-dl --write-pages --cookies cookies.txt --verbose https://www.lynda.com/de/Graphic-Design-tutorials/Grundlagen-guten-Gestaltung/393570-2.html
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--write-pages', '--cookies', 'cookies.txt', '--verbose', 'https://www.lynda.com/de/Graphic-Design-tutorials/Grundlagen-guten-Gestaltung/393570-2.html']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.12.31
[debug] Python version 3.6.4 - Darwin-16.7.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 3.4, ffprobe 3.4
[debug] Proxy map: {}
[generic] 393570-2: Requesting header
WARNING: Could not send HEAD request to https://www.lynda.com/de/Graphic-Design-tutorials/Grundlagen-guten-Gestaltung/393570-2.html: HTTP Error 401: Unauthorized
[generic] 393570-2: Downloading webpage
WARNING: Falling back on generic information extractor.
[generic] Saving request to 393570-2_https_-_www.lynda.com_de_Graphic-Design-tutorials_Grundlagen-guten-Gestaltung_393570-2.html.dump
[generic] 393570-2: Extracting information
ERROR: No video formats found; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/youtube_dl/YoutubeDL.py", line 784, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/lib/python3.6/site-packages/youtube_dl/extractor/common.py", line 438, in extract
    ie_result = self._real_extract(url)
  File "/usr/local/lib/python3.6/site-packages/youtube_dl/extractor/generic.py", line 2939, in _real_extract
    self._sort_formats(entry['formats'])
  File "/usr/local/lib/python3.6/site-packages/youtube_dl/extractor/common.py", line 1069, in _sort_formats
    raise ExtractorError('No video formats found')
youtube_dl.utils.ExtractorError: No video formats found; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; see  https://yt-dl.org/update  on how to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

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Description of your issue, suggested solution and other information

I'm using youtoube-dl with organizational authentication successfully to download courses on Lynda.com. However, this works only for courses in English.

If I use exactly the same setup to download courses in German, the download fails. There seems to be a problem with authorization for these videos. In a browser, I can watch them without any issues